diff --git a/src/base/preferences.cpp b/src/base/preferences.cpp
index 4444944b1..000340c37 100644
--- a/src/base/preferences.cpp
+++ b/src/base/preferences.cpp
@@ -57,9 +57,11 @@
 #include "logger.h"
 #include "preferences.h"
 
-Preferences* Preferences::m_instance = 0;
+Preferences *Preferences::m_instance = 0;
 
-Preferences::Preferences() {}
+Preferences::Preferences()
+{
+}
 
 Preferences *Preferences::instance()
 {
@@ -193,6 +195,7 @@ void Preferences::setCloseToTray(bool b)
 {
     setValue("Preferences/General/CloseToTray", b);
 }
+
 #endif
 
 bool Preferences::isToolbarDisplayed() const
@@ -264,6 +267,7 @@ void Preferences::setWinStartup(bool b)
         settings.remove("qBittorrent");
     }
 }
+
 #endif
 
 // Downloads
@@ -740,6 +744,7 @@ void Preferences::useSystemIconTheme(bool enabled)
 {
     setValue("Preferences/Advanced/useSystemIconTheme", enabled);
 }
+
 #endif
 
 bool Preferences::recursiveDownloadDisabled() const
@@ -753,7 +758,8 @@ void Preferences::disableRecursiveDownload(bool disable)
 }
 
 #ifdef Q_OS_WIN
-namespace {
+namespace
+{
     enum REG_SEARCH_TYPE
     {
         USER,
@@ -842,7 +848,7 @@ namespace {
             versions.sort();
 
             bool found = false;
-            while(!found && !versions.empty()) {
+            while (!found && !versions.empty()) {
                 const QString version = versions.takeLast() + "\\InstallPath";
                 LPWSTR lpSubkey = new WCHAR[version.size() + 1];
                 version.toWCharArray(lpSubkey);
@@ -872,7 +878,6 @@ namespace {
 
         return path;
     }
-
 }
 
 QString Preferences::getPythonPath()
@@ -978,6 +983,7 @@ void Preferences::setMagnetLinkAssoc(bool set)
 
     SHChangeNotify(SHCNE_ASSOCCHANGED, SHCNF_IDLIST, 0, 0);
 }
+
 #endif
 
 #ifdef Q_OS_MAC
@@ -1034,6 +1040,7 @@ void Preferences::setMagnetLinkAssoc()
     CFStringRef myBundleId = CFBundleGetIdentifier(CFBundleGetMainBundle());
     LSSetDefaultHandlerForURLScheme(magnetUrlScheme, myBundleId);
 }
+
 #endif
 
 int Preferences::getTrackerPort() const
@@ -1056,6 +1063,7 @@ void Preferences::setUpdateCheckEnabled(bool enabled)
 {
     setValue("Preferences/Advanced/updateCheck", enabled);
 }
+
 #endif
 
 bool Preferences::confirmTorrentDeletion() const
@@ -1098,6 +1106,7 @@ void Preferences::setTrayIconStyle(TrayIcon::Style style)
 {
     setValue("Preferences/Advanced/TrayIconStyle", style);
 }
+
 #endif
 
 // Stuff that don't appear in the Options GUI but are saved
@@ -1163,7 +1172,7 @@ void Preferences::setMainLastDir(const QString &path)
     setValue("MainWindowLastDir", path);
 }
 
-QSize Preferences::getPrefSize(const QSize& defaultSize) const
+QSize Preferences::getPrefSize(const QSize &defaultSize) const
 {
     return value("Preferences/State/size", defaultSize).toSize();
 }
@@ -1393,7 +1402,7 @@ void Preferences::setTransHeaderState(const QByteArray &state)
     setValue("TransferList/qt5/HeaderState", state);
 }
 
-//From old RssSettings class
+// From old RssSettings class
 bool Preferences::isRSSWidgetEnabled() const
 {
     return value("GUI/RSSWidget/Enabled", false).toBool();
@@ -1459,10 +1468,9 @@ void Preferences::upgrade()
     QStringList labels = value("TransferListFilters/customLabels").toStringList();
     if (!labels.isEmpty()) {
         QVariantMap categories = value("BitTorrent/Session/Categories").toMap();
-        foreach (const QString &label, labels) {
+        foreach (const QString &label, labels)
             if (!categories.contains(label))
                 categories[label] = "";
-        }
         setValue("BitTorrent/Session/Categories", categories);
         SettingsStorage::instance()->removeValue("TransferListFilters/customLabels");
     }